1 /*
2 * freeglut_teapot.c
3 *
4 * Teapot(tm) rendering code.
5 *
6 * Copyright (c) 1999-2000 Pawel W. Olszta. All Rights Reserved.
7 * Written by Pawel W. Olszta, <olszta@sourceforge.net>
8 * Creation date: Fri Dec 24 1999
9 *
10 * Permission is hereby granted, free of charge, to any person obtaining a
11 * copy of this software and associated documentation files (the "Software"),
12 * to deal in the Software without restriction, including without limitation
13 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
14 * and/or sell copies of the Software, and to permit persons to whom the
15 * Software is furnished to do so, subject to the following conditions:
16 *
17 * The above copyright notice and this permission notice shall be included
18 * in all copies or substantial portions of the Software.
19 *
20 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
21 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
22 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
23 * PAWEL W. OLSZTA BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
24 * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
25 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
26 */
27
28 /*
29 * Original teapot code copyright follows:
30 */
31
32 /*
33 * (c) Copyright 1993, Silicon Graphics, Inc.
34 *
35 * ALL RIGHTS RESERVED
36 *
37 * Permission to use, copy, modify, and distribute this software
38 * for any purpose and without fee is hereby granted, provided
39 * that the above copyright notice appear in all copies and that
40 * both the copyright notice and this permission notice appear in
41 * supporting documentation, and that the name of Silicon
42 * Graphics, Inc. not be used in advertising or publicity
43 * pertaining to distribution of the software without specific,
44 * written prior permission.
45 *
46 * THE MATERIAL EMBODIED ON THIS SOFTWARE IS PROVIDED TO YOU
47 * "AS-IS" AND WITHOUT WARRANTY OF ANY KIND, EXPRESS, IMPLIED OR
48 * OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY WARRANTY OF
49 * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. IN NO
50 * EVENT SHALL SILICON GRAPHICS, INC. BE LIABLE TO YOU OR ANYONE
51 * ELSE FOR ANY DIRECT, SPECIAL, INCIDENTAL, INDIRECT OR
52 * CONSEQUENTIAL DAMAGES OF ANY KIND, OR ANY DAMAGES WHATSOEVER,
53 * INCLUDING WITHOUT LIMITATION, LOSS OF PROFIT, LOSS OF USE,
54 * SAVINGS OR REVENUE, OR THE CLAIMS OF THIRD PARTIES, WHETHER OR
55 * NOT SILICON GRAPHICS, INC. HAS BEEN ADVISED OF THE POSSIBILITY
56 * OF SUCH LOSS, HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
57 * ARISING OUT OF OR IN CONNECTION WITH THE POSSESSION, USE OR
58 * PERFORMANCE OF THIS SOFTWARE.
59 *
60 * US Government Users Restricted Rights
61 *
62 * Use, duplication, or disclosure by the Government is subject to
63 * restrictions set forth in FAR 52.227.19(c)(2) or subparagraph
64 * (c)(1)(ii) of the Rights in Technical Data and Computer
65 * Software clause at DFARS 252.227-7013 and/or in similar or
66 * successor clauses in the FAR or the DOD or NASA FAR
67 * Supplement. Unpublished-- rights reserved under the copyright
68 * laws of the United States. Contractor/manufacturer is Silicon
69 * Graphics, Inc., 2011 N. Shoreline Blvd., Mountain View, CA
70 * 94039-7311.
71 *
72 * OpenGL(TM) is a trademark of Silicon Graphics, Inc.
73 */
74
75 #include <FL/glut.H>
76 #include "freeglut_teapot_data.h"
77
78 /* -- PRIVATE FUNCTIONS ---------------------------------------------------- */
79
80
fghTeapot(GLint grid,GLdouble scale,GLenum type)81 static void fghTeapot( GLint grid, GLdouble scale, GLenum type )
82 {
83 double p[4][4][3], q[4][4][3], r[4][4][3], s[4][4][3];
84 long i, j, k, l;
85
86 glPushAttrib( GL_ENABLE_BIT | GL_EVAL_BIT );
87 glEnable( GL_AUTO_NORMAL );
88 glEnable( GL_NORMALIZE );
89 glEnable( GL_MAP2_VERTEX_3 );
90 glEnable( GL_MAP2_TEXTURE_COORD_2 );
91
92 glPushMatrix();
93 glRotated( 270.0, 1.0, 0.0, 0.0 );
94 glScaled( 0.5 * scale, 0.5 * scale, 0.5 * scale );
95 glTranslated( 0.0, 0.0, -1.5 );
96
97 for (i = 0; i < 10; i++) {
98 for (j = 0; j < 4; j++) {
99 for (k = 0; k < 4; k++) {
100 for (l = 0; l < 3; l++) {
101 p[j][k][l] = cpdata[patchdata[i][j * 4 + k]][l];
102 q[j][k][l] = cpdata[patchdata[i][j * 4 + (3 - k)]][l];
103 if (l == 1)
104 q[j][k][l] *= -1.0;
105 if (i < 6) {
106 r[j][k][l] =
107 cpdata[patchdata[i][j * 4 + (3 - k)]][l];
108 if (l == 0)
109 r[j][k][l] *= -1.0;
110 s[j][k][l] = cpdata[patchdata[i][j * 4 + k]][l];
111 if (l == 0)
112 s[j][k][l] *= -1.0;
113 if (l == 1)
114 s[j][k][l] *= -1.0;
115 }
116 }
117 }
118 }
119
120 glMap2d(GL_MAP2_TEXTURE_COORD_2, 0.0, 1.0, 2, 2, 0.0, 1.0, 4, 2,
121 &tex[0][0][0]);
122 glMap2d(GL_MAP2_VERTEX_3, 0.0, 1.0, 3, 4, 0.0, 1.0, 12, 4,
123 &p[0][0][0]);
124 glMapGrid2d(grid, 0.0, 1.0, grid, 0.0, 1.0);
125 glEvalMesh2(type, 0, grid, 0, grid);
126 glMap2d(GL_MAP2_VERTEX_3, 0.0, 1.0, 3, 4, 0.0, 1.0, 12, 4,
127 &q[0][0][0]);
128 glEvalMesh2(type, 0, grid, 0, grid);
129 if (i < 6) {
130 glMap2d(GL_MAP2_VERTEX_3, 0.0, 1.0, 3, 4, 0.0, 1.0, 12, 4,
131 &r[0][0][0]);
132 glEvalMesh2(type, 0, grid, 0, grid);
133 glMap2d(GL_MAP2_VERTEX_3, 0.0, 1.0, 3, 4, 0.0, 1.0, 12, 4,
134 &s[0][0][0]);
135 glEvalMesh2(type, 0, grid, 0, grid);
136 }
137 }
138
139 glPopMatrix();
140 glPopAttrib();
141 }
142
143
144 /* -- INTERFACE FUNCTIONS -------------------------------------------------- */
145
146 /*
147 * Renders a beautiful wired teapot...
148 */
glutWireTeapot(GLdouble size)149 void glutWireTeapot( GLdouble size )
150 {
151 /* We will use the general teapot rendering code */
152 fghTeapot( 10, size, GL_LINE );
153 }
154
155 /*
156 * Renders a beautiful filled teapot...
157 */
glutSolidTeapot(GLdouble size)158 void glutSolidTeapot( GLdouble size )
159 {
160 /* We will use the general teapot rendering code */
161 fghTeapot( 7, size, GL_FILL );
162 }
163
164 /*** END OF FILE ***/
165